Observatory · observe first
Follow the allocation change
Matched S&P 500 members → sector → industry → sub-industry → company. Each step uses the same percentage points.
Historical time machine
Historical observation
20182026
1 · Sector
Weight and 12M allocation change
2 · Industry
Inside Energy
3 · Sub-industry
Inside Oil & Gas Exploration & Production
Oil & Gas Exploration & Production · weight
1.17%
Industry change · 12M
-0.09 pp
Oil & Gas Exploration & Production · contribution
-0.086 pp
Company participation
20%
of industry constituents above their 6M weight average
4 · Companies driving this sub-industry
Feb 2018 · sorted by absolute contribution to 12-month change
| Company | Country | Market cap | Universe weight | 3M contribution | 12M contribution | 12M price return | Above 6M weight average |
|---|---|---|---|---|---|---|---|
| EOG Resources → EOG | United States | $58.7bn | 0.352% | -0.028 pp | -0.028 pp | -11.8% | No |
| Devon Energy → DVN | United States | $16.1bn | 0.097% | -0.027 pp | -0.027 pp | -25.9% | No |
| Occidental Petroleum → OXY | United States | $50.2bn | 0.301% | -0.026 pp | -0.026 pp | -12.5% | No |
| ConocoPhillips → COP | United States | $63.8bn | 0.382% | -0.019 pp | -0.019 pp | -7.2% | No |
| EQT Corporation → EQT | United States | $7.2bn | 0.043% | +0.014 pp | +0.014 pp | -7.3% | Yes |
Company contributions use weights among matched S&P 500 members and add through each level without rescaling. Companies without matched shares and prices are omitted. These observations do not establish official index weights or actual fund flows.